Saw-clamp.



No. misas'. Patented nec. 23, |902. msn. coNvEnsE.

vSAW CLAMP.

(Appxiwion alea oet. 2s, 1901.)

(Numdam b MIIIIIIIIIIII S 'I jin@ kil,

U TTED STATES PATENT OFFICE.

MASCl-IIL D. CONVERSE, OF NEW YORK, N. Y., ASSIGNOR TO JOHN J. TOWER,

OF MONTCLAIR, NEI/V JERSEY.

SAW-CLAIVI P.

SPECIFICATION' forming part of Letters Patent No. 716,385, dated December 23, 1902. Application filed October 28, 1901. Serial No. 80,319. (No model.)

Be it known that I, MAscHIL D. CONVERSE, a citizen of the United States, residing at New York, borough of Manhattan. in the county of New York and State of New York, have invented certain new and useful Improvements in Saw-Clamps, of which the following is a specification.

My invention relates to improvements in io saw-clamps in which the clamping-jaws are open to receive the saw from below; and the objects of my improvements are, first, to provide means for preventing the saw from chat tering; second, to afford instant adjustment x5 and clamping and releasing of the saw, and, third, to reduce the cost of manufacture of such articles. I attain these objects by means of certain mechanisms and their combination and arrangement hereinafter illustrated zo and described.

Figure l is a plan view of my invention, showing its construction and operation in part, a saw s being shown in place; Fig. 19,4, a detail edge view of a certain part of Fig. l,

and Fig. 2 is a front elevation of the same. Fig. 3`is a detail plan View of parts thereof; and Fig. is a sectional view on line 4 4 of Fig. l, further showing construction and operation.

3o Like letters indicate corresponding parts throughout the several iigures.

A is the main frame, connecting two similar dogs B B, which latter each have a raised anvil-head b b on the upper side opposite the points to receive the blows of a hammer when driving into a bench, as seen in Fig. 4. At either end there is an arch O C, to which is joined the clamp-jaw D at its ends. The frame A is provided with a bracket E, hav- 4o ing a hole for a screw at cat its lowermost edge. Theseparts are preferably made integral. G is the other and slidable clampjaw, which has fa flange g extending from its middle rearwardly and flush with its under side and through which there is a slot g2 to stride with a free fit a pivotal rivet 7L, which latter is fixed in the frame A midway or equidistant from the dogs B B and carries pivotally the clamping-le ver L, the head t' of which 5o latter is eccentric to the pivotal hole therein and acts against a block-surface j of the jaw G. This eccentric head t' is recessed at one side (shown by the dotted line 7o in Fig. l) to form a shoulder at Z, (see Fig. 11.13,) whereby (when the lever is moved to the left) through contact with a projection fm on the surface of the liange g the clamp-jaw G is drawn away from the jaw D.

It will be seen that movement of the lever L to the right will cause the eccentric head t' 6o to engage the surface j and push the jaw G toward the jaw D, the former sliding upon the surface ofthe frame A,andthus instantly grip the saw s.

It will be seen that the lever L operates in a horizontal plane, consequently is out of the way when the Vsaw-teeth are being led.

A feature of my invention is comprised in making the jaws D and G .of sufficiently resilient material and so arranging them as to allow of their being sprung out of straight line and recover their normal position by movement of the clamping-lever L, which is pivoted intermediate of the ends of the frame, and to this end in so proportioning theeccentric head z' that the said jaws shall be sprung from the straight line shown by the full lines to the curved position shown by the dot-ted lines in Fig. 1, the object being to hold the saw s on a curve, soas to prevent its 8c chattering. and ringing.

It is sometimes desirable to make sawclamps of the type described of cast-iron or other similar brittle material, and in such case it has been found if the upper surfaces of the arms to which the dogs B B are attached are made flat that on driving the points into the wood the armsof the dogs receiving the impact often break. I therefore obviate this dificulty by constructing or castgo ing with raised heads or anvils b b immediately opposite the points ofthe dogs to centralize the blows from the hammer and `prevent the latter contacting with the arms.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

l. In a saw-clamp, a frame provided with dogs, and a resilient jaw thereto attached by arches at the ends, and a second resilient roo sldable jaw, in combination with a horizontally-movable clamping-lever and eccentricl l l silient jaw thereto attached by arches at the ends, and a second resilient movable jaw, and a pivoted clamping-lever, in central engaejement with the movable jaw.

In testimony whereof I have signed my name to this specification in the presence of.

tWo subscribing Witnesses.

MASOHIL D. CONVERSE. Witnesses:

GEO. F. BENTLEY, PETER FLINT. 

